Function returnThumbnailsImages

scripts/cache.js:167–238

(images, callback, file = false)

var data = false;

function returnThumbnailsImages(images, callback, file = false)
{
	if(!data) data = storage.get('cache') || {};

	const single = images.length === undefined ? true : false;
	images = single ? [images] : images;

	const sizes = getSizes();

	let thumbnail = {};
	const thumbnails = {};
	const toGenerateThumbnails = [];
	const toGenerateThumbnailsData = {};

	const time = app.time();

	for(let i = 0, len = images.length; i < len; i++)
	{
		const image = images[i];
		const forceSize = image.forceSize || 150;

		const sha = imageSizeSha(image);
		const imgCache = data[sha];

		const size = image.type ? sizes[image.type][forceSize] : sizes.image[forceSize];
		const path = addCacheVars(p.join(cacheFolder, sha+'.jpg'), size, sha);

		if(typeof imgCache == 'undefined' || !fs.existsSync(p.join(cacheFolder, sha+'.jpg')))
		{
			toGenerateThumbnails.push(image);
			toGenerateThumbnailsData[image.path] = {sha: sha, vars: image.vars, type: image.type || false, forceSize: forceSize};

			thumbnails[sha] = thumbnail = {cache: false, path: '', sha: sha};
		}
		else
		{
			data[sha].lastAccess = time;

			if(imgCache.size != size)
			{
				toGenerateThumbnails.push(image);
				toGenerateThumbnailsData[image.path] = {sha: sha, vars: image.vars, type: image.type || false, forceSize: forceSize};

				thumbnails[sha] = thumbnail = {cache: true, path: escapeBackSlash(path), sha: sha};
			}
			else
			{
				thumbnails[sha] = thumbnail = {cache: true, path: escapeBackSlash(path), sha: sha};
			}
		}
	}

	if(toGenerateThumbnails.length > 0 && file)
	{
		threads.job('cacheMakeAvailable', {useThreads: 0.01, delay: 50}, async function() {

			await file.makeAvailable(toGenerateThumbnails, function(image) {